<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
<h3>首 页</h3>

<h5>欢迎登录 <span th:text="${username}"></span></h5>
</body>
</html>